Abstract: Provided are a fault diagnosis apparatus and method based on fluorescence multivariate correction analysis of transformer oil, relating to the field of transformer fault diagnosis technology. Thus, the problem of large volume and weight of the apparatus, high costs, and inconvenience to use caused when in the related art, a fluorescence spectrometer is directly used to acquire the fluorescence spectrum of transformer oil is solved. The monochromatic excitation light of an optimal excitation wavelength generated by a fluorescence excitation source is used to excite the transformer oil in a fluorescence excitation detection apparatus to generate fluorescence. The fluorescence excitation detection apparatus generates the fluorescence according to the input monochromatic excitation light and inputs the fluorescence to a fluorescence signal acquisition and analysis apparatus.

Abstract: Provided is a composition comprising aflibercept and a variant thereof, wherein the variant is a truncation variant with a truncated VEGF binding portion of aflibercept, and wherein the content of the truncation variant is less than or equal to about 20% by mass percentage. Also provided is a pharmaceutical formulation comprising the composition. Further, provided are a method for detecting the variant and use of the variant in quality inspection or quality control of an aflibercept-containing product.

Abstract: The present invention relates to the field of biotechnology, in particular to a DNA polymerase mutant and the use thereof. Compared with a wild type, the mutant provided in the present invention has a significantly improved DNA polymerization activity, significantly improved affinity to DNA and amplification uniformity; and has good effects in the amplification of multiplex PCR, high-GC templates and complex templates. A hot-start-version DNA polymerase is further prepared by means of using antibodies or chemical modifications, wherein the yield of the DNA polymerase is significantly improved, while the primer dimer is significantly decreased. The prepared mutant hot-start DNA polymerase can be applied to PCR amplification of multiplex PCR, high-GC templates and complex templates.

Abstract: An amine-bromine two electron electrolyte of flow battery and the use thereof, and a flow battery are provided. In the electrolyte, an amino compound with an electron-withdrawing group at the ortho-position of an amino group is used to react with bromine charged to a positive valence so as to form an amine-bromine compound, such that positive-valence bromine is stabilized, and a reversible two-electron transfer reaction from bromine ions to amino compounds is achieved. The amine compounds have different solubilities and produce different voltages depending on their substituent groups, and thus have extensive adjustability and applicability for use in acidic, neutral, and weak alkaline flow battery systems. Flow batteries assembled with the electrolyte prepared using this reaction has the advantages of low cost and high energy density, and can achieve a longer cycle life and higher battery efficiency.

Abstract: Provided in the present disclosure are a cutter head, a grass chopping structure, and a lawn mower. The cutter head includes a cutter head body and blades; the cutter head body surface A is provided with a central part connected to a rotary driving component; the cutter head body edge part can be connected to a mowing cutter; and the blades are disposed on the cutter head body surface A. The grass chopping structure includes the cutter head and a protective cover sleeved on the cutter head body surface A and edge part, where the protective cover is provided with air guide holes along a circumferential direction of the cutter head. The lawn mower has the above cutter head or the above grass chopping structure. When the cutter head rotates, the blades also rotate together to generate airflow to implement grass chopping, thereby reducing the formation of grass clumps.

Abstract: A display panel, a display apparatus and a method for manufacturing a display panel are provided. The display panel includes: a base substrate; multiple light-emitting devices, where the light-emitting device includes a first semiconductor layer, a second semiconductor layer and a light-emitting layer located between the first and second semiconductor layers, and the second semiconductor layer is located on a side of the light-emitting layer away from the base substrate; a first package structure, located on the side of the base substrate, where the first package structure includes a first package part located between two adjacent light-emitting devices; and a second package structure, where at least part of the second package structure is located on a side of the light-emitting device away from the base substrate, and a resistivity of the first package structure is higher than that of the second package structure.

Abstract: The present invention provides a polishing pad, a polishing apparatus and a polishing method for a silicon wafer. The polishing pad comprises a polishing surface in contact with the silicon wafer. The polishing surface is provided with at least one groove. When polishing the silicon wafer, the edge of the silicon wafer is at least partially suspended above the groove. The polishing pad, polishing apparatus and silicon wafer polishing method according to the present invention can reduce the polishing rate at the edge of the silicon wafer while keeping the polishing rate of the entire wafer basically unchanged, thereby improving the flatness of the edge thickness of the silicon wafer as well as improving the production yield.

Abstract: The present application provides a method and a device of chemical mechanical polishing (CMP). The method comprises providing a semiconductor wafer to be subjected to polishing; conducting a CMP process to the wafer, wherein the wafer is on a first plane; conducting a hanging treatment, wherein, in the hanging treatment, the wafer is on a second plane above the first plane, the wafer is hanged to expose the lower surface, and the wafer is in rotation. According to the present application, the hanging treatment can remove the slurry, the polishing particles and byproducts from the wafer surface, therefore, it prevents from the adverse effects caused by the polishing particles and byproducts on the wafer in the following process.

Abstract: The present invention provides a polishing pad, a polishing apparatus and a polishing method for a silicon wafer. The polishing pad comprises a polishing surface in contact with the silicon wafer. The polishing surface is provided with at least one groove. When polishing the silicon wafer, the edge of the silicon wafer is at least partially suspended above the groove. The polishing pad, polishing apparatus and silicon wafer polishing method according to the present invention can reduce the polishing rate at the edge of the silicon wafer while keeping the polishing rate of the entire wafer basically unchanged, thereby improving the flatness of the edge thickness of the silicon wafer as well as improving the production yield.

Abstract: Disclosed are a preparation method and applications of a spinosin-Na monomer of Ziziphi Spinosae Semen. The preparation method includes: pulverizing Ziziphi Spinosae Semen; hydrolyzing the powder with an acidic hydrolysis solution; neutralizing the hydrolysate; extracting the supernatant with ethyl acetate several times to produce a crude extract; and separating the crude extract sequentially using macroporous resin and HPLC to produce the spinosin-Na monomer of Ziziphi Spinosae Semen with a good water solubility and a purity greater than 98%. The spinosin-Na monomer prepared herein is capable of significantly inhibiting the proliferation of tumor cells, so that it can be applied in the preparation of a functional food and/or medicine for preventing and/or treating tumors.

Abstract: A transcranial magnetic stimulation circuit, a transcranial magnetic stimulator and a magnetic impulse generation method thereof are provided, in which the circuit includes at least two inductance coils, a direct current, a charging and discharging circuit and a controller. The controller controls the inductance coils to synchronously generate magnetic impulses through an electronic switch. The method includes: coinciding central lines of the inductance coils with each other; controller outputting an impulse sequence to control the electronic switch to enable the inductance coils to synchronously generate magnetic impulses; and superposing the magnetic impulses to form the magnetic impulses required by the transcranial magnetic stimulator. The transcranial magnetic stimulator includes a pillow base and the transcranial magnetic stimulation circuit. A containing cavity is disposed in the pillow base.

Abstract: A system and method is provided for managing and publishing feedback using a merchant-independent and user-centric approach. The system comprises means for registering a user. The system also provides means for collecting, from the registered user, information verifiably indicating, to an appreciable extent, that the user has used a product identified by the collected information. The system further provides means for matching the product to an officially identified product stored in a product database. The system additionally provides means for enabling the user to provide only a single instance of feedback on the matched product. The system further provides means for enabling the user to view the feedback provided by the user on the matched product as well as the feedback provided by other registered users on the matched product.

Abstract: A method and system are provided for performing elliptical-based and hybrid surveillance, performing false target detection and resolution, and performing integrity monitoring using one or more receiving and transmitting elements time synchronized to a common precision time reference, and a central workstation. Antennas for transmitting and receiving elements are located at known positions separated from one another. At a given time, one of the transmitting elements transmits an interrogation signal to one or more targets, which respond to the interrogation with a reply transmission, received by one or more receiving elements.

Abstract: A method and system are provided for performing elliptical-based and hybrid surveillance, performing false target detection and resolution, and performing integrity monitoring using one or more receiving and transmitting elements time synchronized to a common precision time reference, and a central workstation. Antennas for transmitting and receiving elements are located at known positions separated from one another. At a given time, one of the transmitting elements transmits an interrogation signal to one or more targets, which respond to the interrogation with a reply transmission, received by one or more receiving elements.